Oiling device



Nov. s, 1940. E, F TERRY' 2,220,301

OILING DEVICE Filed May 4. 1939 l 45 40 24451 50 5 '38v aa a1. 51 525,45 a? SYM w 'rus ArroRNEY.

Patented Nov. 5, 1940 OILING DEVICE Edward Terry, Phillipsburg, N. J.,assigner to 'Ingersoll-Rand Company, Jersey City, N. J., a

corporation of New Jersey 1y Application May 4, 1939, serial No. 271,665

2 Claims.

This invention relates to oiling devices, and more particularly to anoiling device for metering oil into the pressure fluid stream flowing topneumatically actuated tools.

One object of the invention is to assure the retention of oil vapor insuspension in the pressure fluid entering the tool so that oil will becarried in that state to all the bearing portions of the tool to whichthe pressure fluid has access.

Another object is to assure a favorable operative position for theoiling device in all the various positions which the tool carrying theoiling device may assume during operation.

These and other objects may be readily accomplished by attaching theciling device swingingly directly to the pneumatic tool so that thedistance between the parts to be lubricated and the point at which theoil is introduced'into thepressure fluid stream is maintained as shortas possible. The oil will then remain in suspension in the pressurefluid until the pressure fluid reaches the various chambers and cavitiesof the tool to which it has access and a uniform distribution of the oilto the parts requiring it will thereby be effected.

By reason of this arrangement the undesirable occurrence of oilgravitating to the wall of the pressure fluid supply conduit and beingimpelled therealong in the form of a stream by the pressure fluid willbe entirely eliminated. By being swingingly attached to the tool theoiling device will, moreover, act as a pendulum and readily swing into aposition in which the various ports and passages of the oiling deviceserving to effect the delivery of oil into the pressure fluid streamwill always assume the positions best suited to assure uniformity of oildelivery.

In the drawing accompanying this specication and in which similarreference numerals refer to similar parts,

Figure 1 is an elevation, partly in section, of an oiling deviceconstructed in accordance with the practice of the invention and aportion of a pneumatic tool to which the oiling device is attached, and

Figure 2 is a transverse view taken through Figure 1 on the line 2-2.

Referring more particularly to the drawing, the oiling device,constructed in accordance with the practice of the invention anddesignated in general by 20, is shown attached to a pneumatic tool ofwhich the back head 2| and the cylinder 22 are shown as casing parts.

The back head 2l may be attached. to the cylinder 22 in any convenientmanner and has a tapered bore 23 constituting a valve chamber toaccommodate a throttle valve 24. The throttle valve is of the rotarytype and has a longitudinally extending passage 25 from which radiates`a port 26 for conveying pressure fluid to a supply 5 passage 2l, in theback head and the cylinder, leading to a suitable distributing valvemechanism (not shown) but which may be located in the rearward end ofthe cylinder 22.

The oiling device 20 comprises a receptacle or 10 casing 28, of angularshape, the interior of which constitutes a reservoir 29 for oil, andextending through the reservoir is a gooseneck or angleconnection 30which may constitute the end portion of a pressure fluid supply line andis attached 15 directly to the pneumatic tool, as for example to theback head 2l,

In order to assure a pendulum action of the oiling device so that thecasing 28 will readily assume a vertical position in the various posi-2"() tions of operation which the pneumatic tool may occupy theangle-connection is attached swingingly to the back head. To this endthe terminus of the angle-connection is provided with an enlargement 3lwithin -extends into the end of the 25 bore 23 and has a tapered surface32 which seats upon aA correspondingly shaped bearing surface 33 withina plug 34 threaded into the end of the bore 23.

The surfaces 32' and 33 cooperate with each 30 other to prevent leakageof pressure uid from the bore 23 to the atmosphere and will bemaintained in sealing engagement with each other by the pressure fluidflowing through the angle-connection 3B and acting against the end ofsaid con- 35 nection which constitutes a pressure surface 35.

The oil intended to be delivered from the reservoir 29 into thepassageway 36 in the angle-connection, and which oil may be introducedinto the reservoir through an opening 31 normally sealed 40 by a plug38, is conveyed from the reservoir by a conduit 39 having one endlocated near the bottom of the reservoir. The opposite end of theconduit is attached to a plug 40 extending through the walls of theconnection 30 and the 45 casing 28.

The plug 40 is hollow, having a bore consisting of an enlarged portion4I anda reduced portion 42 to accommodate a nozzle member 43 whichcontrols the delivery of oil from the con- 50 duit 39 into thepassageway 36. The nozzle member 43 is rotatable in the plug 40 and hasan annular groove 44 in its periphery registering with the outlet end ofthe conduit 39. A passage 45 extends transversely through the plug fromone 55 ever, to prevent the loss of fluid medium through the plug 40. Tothis end a gasket 50 is seated upon the shoulder 5| carrying the taperedsurface 49 and a plug 52 is threaded into the plug 40 to press thegasket 50 firmly against the shoulder 5| and also to hold the nozzlemember against unauthorized rotative movement.

In order to insure the same pressure Value within the reservoir 29 asthat existing within the passageway a tube 53 is disposed in the wall ofthe angle-connection 3U to extend to a point near the wall of the casing28, that is to say, to a point above the surface of the oil in thereservoir.

The operation of the device is as follows: Let it be assumed that thepneumatic tool occupies an operative position in either a horizontal ora vertical plane and that the oiling device has swung to its lowermostposition and that pressure fluid has been admitted through the supplyline including the angle-connection 3i) for distribution to the motorelement of the tool. Pressure fluid will then enter the reservoir 29through the tube 53 and create a pressure on the oil. During thesubsequent operation of the tool the pulsations caused in the pressurefluid stream by the admission and cut-off of pressure fluid into thetool will be communicated into the reservoir. The resulting fluctuationsof pressure within the reservoir will cause oil to rise through theconduit 39 and to be forced through the passages 44, 45, 45 and 41 intothe passageway 36 where it will intermingle with the pressure fluid andbe carried thereby into the pneumatic tool.

In the event that it be desired, for any one of well known reasons, tovreduce the quantity of oil delivery to the pressure fluid stream in thepassageway 36 the nozzle member 43 may be given a partial turn in theplug 4U to place the passage 41 at an angle to the direction of thepressure fluid stream and thereby reduce the effective area of thepassage 41 which will be presented to the force of the draft of thepressure fluid,

In practice the present invention has been found to serve eiciently as ameans for effecting the adequate lubrication of pneumatic tools. 'I'heclose proximity of the oiling device to the points intended to belubricated assures the entrainment of the oil in the pressure fluidstream and, therefore, the delivery of the oil in the form of `a mistwhich will be certain to be carried to all the surfaces requiringlubrication.

A further highly desirable -advantage of the present invention is thatby so attaching the oiling device to the pneumatic tool that the oilingdevice .will always assume substantially the same operativepositionirrespective of the position of the pneumatic tool the uniformdelivery of oil to the pneumatic tool will be assured under allcircumstances.

I claim:

1. In an oiling device, the combination with a pneumatic tool casinghaving a passage for pressure fluid, of an angle-connection swinginglyattached to the casing to convey pressure fluid into the passage, areceptacle on the angle-connection having a reservoir for oil, a tubefor conveying pressure fluid from the angle-connection intovthereservoir, a conduit for conveying oil from the lower portion of thereservoir into the angle-connection, and means adjustable with respectto the angle-connection for controlling the flow of oil into theangle-connection.

2. In an oiling device, the combination With a pneumatic tool casinghaving a passage for pressure fluid,A of an angle-connection swinginglyattached to the casing to convey pressure fluid into the passage, areceptacle on the angle-connection having a reservoir for oil, a conduiteX- tending from the bottom of the reservoir toa point above theangle-connection for' conveying oil from the reservoir, and a nozzle inthe receptacle extending into the angle-connection to convey oil fromthe conduit into the angle-connection and being adjustable to controlthe rate of flow of oil.

EDWARD F. TERRY.

